Headrest limiting and adjusting mechanism of child safety seat

Abstract

The child safety seat headrest limiting and adjusting mechanism comprises a seat base, a sliding block, a headrest, a pulling plate, a spring, a fixing plate and a limiting plate, the limiting plate can lock the headrest when clamped in a limiting space, and locking is stable; the locking state of the headrest can be relieved by pulling the pull handle of the pull plate, the position of the headrest can be adjusted by pulling the pull plate or pushing the headrest after unlocking, the headrest is automatically locked by loosening the pull handle, operation is easy and fast, and adjustment is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the field of child safety seats, in particular to a headrest limit adjustment mechanism for child safety seats. Background Art

[0002] With the popularization of child safety seats, the safety of child safety seats is receiving more and more attention. Headrests are a safety structure that is more valued by the public at this stage. Existing headrest structures generally have many parts, the adjustment action is relatively complicated, and there is a defect that the locking is not stable enough. Utility Model Content

[0003] In view of the defects of the existing child safety seat headrest structure, the technical problem to be solved by the present invention is to provide a child safety seat headrest limit adjustment mechanism which is safe, reliable, easy to operate and firmly locked.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, the present invention is realized by the following technical measures: a child safety seat headrest limit adjustment mechanism includes a seat base, a sliding block, a headrest, a pull plate, a spring, a fixing plate, and a limit plate.

[0005] The seat base is provided with a groove I and a guide rail groove, and a plurality of limit grooves are provided on both sides of the guide rail groove;

[0006] One end of the sliding block is embedded in the guide rail groove and fixedly connected to the headrest;

[0007] The headrest is placed in groove I, and the lower end of the headrest is provided with a side foot, the lower end of the headrest is provided with a limit plate groove, and the limit plate groove is provided with a limit hole groove; the middle part of the headrest is provided with a groove II, and the edge of groove II is provided with a plurality of clamping feet, which are clamped to the pull plate, and a spring cavity is provided in groove II, and a top foot is provided on the upper part of the spring cavity;

[0008] The pull plate is embedded in the groove II, with a handle on the top of the pull plate, guide grooves on both sides of the bottom, a spring groove on the pull plate, a top plate at the lower end of the spring groove, and a groove III for the clamping foot to be clamped into.

[0009] The spring is placed in the spring cavity, with one end of the spring resting against the top foot of the headrest and the other end resting against the top plate of the pull plate;

[0010] The fixing plate is fixedly connected to the seat base, and a plurality of limiting grooves are provided on the fixing plate. The limiting grooves on the fixing plate cooperate with the limiting grooves of the seat base to form a limiting space;

[0011] One end of the limiting plate is placed in the limiting plate groove, and the other end is placed in the limiting space. A limiting hole is provided on the limiting plate, and a limiting bolt is provided in the limiting hole. One end of the limiting bolt is placed in the limiting hole groove and connected to the headrest, and the other end is placed in the guide groove and connected to the pull plate.

[0012] Furthermore, a screw hole is provided on the portion of the sliding block embedded in the guide rail groove, and a bolt hole is provided on the headrest. The headrest and the sliding block are connected and fixed through the bolt hole, the screw hole and the screw.

[0013] Furthermore, the guide grooves are arranged obliquely, and the angle between the two guide grooves is an obtuse angle.

[0014] Furthermore, a limiting column is provided at the upper end of the headrest groove II, and a limiting column groove is provided on the pull plate at the lower end of the handle, and the limiting column groove is sleeved on the limiting column.

[0015] Furthermore, the sliding block is T-shaped.

[0016] Furthermore, the upper end of the fixing plate is provided with a bend, and the upper end of the fixing plate passes around the headrest and is fixedly connected to the seat base by screws. The lower end of the fixing plate presses the lower end foot of the headrest and is fixedly connected to the seat base by screws.

[0017] Furthermore, the side of the fixing plate is provided with reinforcing ribs.

[0018] Compared with the prior art, the advantages of the present invention are: the headrest limit adjustment mechanism of the child safety seat can lock the headrest when the limit plate is stuck in the limit space, and the lock is firm; the locking state of the headrest can be released by pulling the handle of the pull plate, and the position of the headrest can be adjusted by pulling the pull plate or pushing the headrest after the lock is released, and the locking of the headrest is automatically completed by releasing the handle. The operation is simple and fast, and the adjustment is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is an exploded view of the headrest limit adjustment mechanism of the child safety seat described in the present invention;

[0021] Figure 2 A schematic structural diagram of the headrest, pull plate and limit plate described in the present invention;

[0022] Figure 3 A schematic structural diagram of the pull plate described in the utility model;

[0023] Figure 4 A schematic structural diagram of the fixing plate described in the utility model.

[0024] Explanation of the accompanying reference numerals: 1. seat base; 2. sliding block; 3. headrest; 4. pull plate; 5. spring; 6. fixing plate; 7. limit plate; 8. groove I; 9. guide rail groove; 10. limit groove; 11. screw hole; 12. side foot; 13. bolt hole; 14. limit plate groove; 15. limit hole groove; 16. groove II; 17. clamping foot; 18. spring cavity; 19. top foot; 20. handle; 21. guide groove; 22. top plate; 23. groove III; 24. limit hole; 25. limit column; 26. limit column groove. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0026] In the description of the present utility innovation, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "bottom", "top", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility innovation and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility innovation.

[0027] Please refer to Figure 1-4 The embodiment of the present invention provides a child safety seat headrest 3 limit adjustment mechanism, including a seat base 1, a sliding block 2, a headrest 3, a pull plate 4, a spring 5, a fixing plate 6, and a limit plate 7.

[0028] The backrest of the seat base 1 is provided with a groove Ⅰ8 that matches the headrest 3, which is convenient for placing the headrest 3 and allows the headrest 3 to move up and down along the edge of the groove Ⅰ8. A guide groove 9 is provided in the middle of the backrest of the seat base 1, and a number of evenly distributed limit grooves 10 are provided at both ends of the guide groove 9;

[0029] The sliding block 2 is T-shaped, and its shape matches the guide groove 9 of the seat base 1, so that it can be easily moved up and down after being inserted into the guide groove 9. The portion of the sliding block 2 that is inserted into the guide groove 9 is provided with a screw hole 11;

[0030] The lower end of the headrest 3 is provided with a side foot 12, the size of the side foot 12 coincides with the groove Ⅰ8 of the seat base 1, so that the headrest 3 can slide up and down in the groove of the seat base 1. A bolt hole 13 is provided in the middle part of the lower end of the headrest 3. The bolt hole 13 is used to connect the screw hole 11 of the sliding block 2. The headrest 3 and the sliding block 2 are connected and fixed by the bolt holes 13, screw holes 11, and screws. A horizontal limit plate groove 14 is provided at the side feet 12 on both sides of the lower end of the headrest 3. A limit hole groove 15 is provided in the limit plate groove 14. A groove Ⅱ16 is provided in the middle part of the headrest 3. A plurality of card feet 17 are provided on the headrest 3 at the edge of the groove Ⅱ16. The card feet 17 are snapped to the edge of the pull plate 4. A spring cavity 18 for placing the spring 5 is provided in the groove Ⅱ16. A top foot 19 is provided on the upper part of the spring cavity 18, and a limit column 25 is provided at the upper end of the groove Ⅱ16.

[0031] The pull plate 4 is embedded in the groove II 16 and can move a short distance in the up and down direction in the groove II 16. A handle 20 is provided on the top of the pull plate 4. A limit column groove 26 is provided at the lower end of the handle 20. The limit column groove 26 is sleeved on the limit column 25 on the headrest 3. A spring 5 groove is provided at the lower end of the limit column groove 26. A top plate 22 is provided at the lower end of the spring 5 groove. The groove III 23 on the pull plate 4 is provided at the connection between the pull plate 4 and the card foot 17, which is convenient for the card foot 17 to be snapped in. The pull plate 4 is installed in the groove II 16 of the headrest 3 through the card foot 17 and the groove III 23. Guide grooves 21 are provided on both sides of the lower end of the pull plate 4. The guide grooves 21 are inclined, and the angle between the two guide grooves 21 is obtuse.

[0032] The spring 5 is placed in the spring cavity 18, with one end of the spring 5 resting against the top foot 19 of the headrest 3 and the other end resting against the top plate 22 of the pull plate 4;

[0033] The upper and lower ends of the fixing plate 6 are fixedly connected to the seat base 1 with screws. The lower end of the fixing plate 6 presses the lower end foot 12 of the headrest 3. The upper end of the fixing plate 6 is fixedly connected to the seat base 1 with screws after passing the headrest 3. The upper end of the fixing plate 6 is provided with a bend to make the overall structure of the upper end wider. The fixing plate 6 is provided with a number of evenly distributed limiting grooves 10. The limiting grooves 10 on the fixing plate 6 and the limiting grooves 10 of the seat base 1 cooperate to form a limiting space. The side of the fixing plate 6 is provided with a reinforcing rib.

[0034] The limiting plate 7 is a rectangular body. One end of the limiting plate 7 is placed in the limiting plate groove 14, and the other end is placed in the limiting space to limit the up and down movement of the headrest 3. A limiting hole 24 is provided on the limiting plate 7, and a limiting bolt is provided in the limiting hole 24. One end of the limiting bolt is placed in the limiting hole groove 15 and connected to the headrest 3, and the other end is placed in the guide groove 21 and connected to the pull plate 4.

[0035] The present embodiment provides a limit adjustment mechanism for the headrest 3 of the child safety seat. When the headrest 3 needs to be moved upward during use, the handle 20 of the pull plate 4 is pulled upward, the spring 5 is compressed, and the limit bolt on the limit plate 7 moves along the obtuse guide groove 21 of the pull plate 4, and the other end moves in the limit groove 10 of the headrest 3, so that the pull plate 4 drives the limit bolt to move inward during the rising process, and then drives the limit plate 7 to move inward. When the limit plate 7 is completely moved into the limit plate groove 14, the other end of the limit plate 7 leaves the limit space between the fixed plate 6 and the seat base 1, and the limiting effect on the headrest 3 is released. At this time, the pull plate 4 is continued to be pulled, and the limit column groove 26 at the upper end of the pull plate 4 is against the limit column 25 of the headrest 3, and the lower end of the pull plate 4 is against the groove II 16 of the headrest 3. When the headrest 3 needs to be moved downward, the handle 20 is pulled upward to release the limiting effect of the limiting plate 7 on the headrest 3, and the handle 20 is kept pulled. After pushing the headrest 3 downward to the appropriate position, the handle 20 is released to complete the position locking.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. Child safety seat headrest limit adjustment mechanism, characterized by: Including seat base, sliding block, headrest, pull plate, spring, fixed plate, limit plate, The seat base is provided with a groove I and a guide rail groove, and a plurality of limit grooves are provided on both sides of the guide rail groove; One end of the sliding block is embedded in the guide rail groove and fixedly connected to the headrest; The headrest is placed in groove I, and the lower end of the headrest is provided with a side foot, the lower end of the headrest is provided with a limit plate groove, and the limit plate groove is provided with a limit hole groove; the middle part of the headrest is provided with a groove II, and the edge of groove II is provided with a plurality of clamping feet, which are clamped to the pull plate, and a spring cavity is provided in groove II, and a top foot is provided on the upper part of the spring cavity; The pull plate is embedded in the groove II, with a handle on the top of the pull plate, guide grooves on both sides of the bottom, a spring groove on the pull plate, a top plate at the lower end of the spring groove, and a groove III for the clamping foot to be clamped into. The spring is placed in the spring cavity, with one end of the spring resting against the top foot of the headrest and the other end resting against the top plate of the pull plate; The fixing plate is fixedly connected to the seat base, and a plurality of limiting grooves are provided on the fixing plate. The limiting grooves on the fixing plate cooperate with the limiting grooves of the seat base to form a limiting space; One end of the limiting plate is placed in the limiting plate groove, and the other end is placed in the limiting space. A limiting hole is provided on the limiting plate, and a limiting bolt is provided in the limiting hole. One end of the limiting bolt is placed in the limiting hole groove and connected to the headrest, and the other end is placed in the guide groove and connected to the pull plate.

2. The headrest limit adjustment mechanism for a child safety seat according to claim 1, characterized in that: The portion of the sliding block embedded in the guide rail groove is provided with a screw hole, the headrest is provided with a bolt hole, and the headrest and the sliding block are connected and fixed through the bolt hole, the screw hole and the screw.

3. The headrest limit adjustment mechanism for a child safety seat according to claim 1, characterized in that: The guide grooves are arranged obliquely, and the angle between the two guide grooves is an obtuse angle.

4. The headrest limit adjustment mechanism for a child safety seat according to claim 1 or 3, characterized in that: A limiting column is provided at the upper end of the headrest groove II, and a limiting column groove is provided on the pull plate at the lower end of the handle, and the limiting column groove is sleeved on the limiting column.

5. The headrest limit adjustment mechanism for a child safety seat according to claim 1, characterized in that: The sliding block is T-shaped.

6. The headrest limit adjustment mechanism for a child safety seat according to claim 1, characterized in that: The upper end of the fixing plate is provided with a bend, and the upper end of the fixing plate is fixedly connected to the seat base through screws after passing through the headrest, and the lower end of the fixing plate presses the lower end side foot of the headrest and is fixedly connected to the seat base through screws.

7. The headrest limit adjustment mechanism for a child safety seat according to claim 1 or 6, characterized in that: The side of the fixing plate is provided with reinforcing ribs.

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